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Add often-requested support for defining "multiclasses" which can be instantiated.
This allows you to define multiple definitions with one line, encouraging more .td file factoring. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30027 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
parent
7d51544903
commit
12069866c8
@ -195,6 +195,8 @@ dag { return DAG; }
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class { return CLASS; }
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def { return DEF; }
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defm { return DEFM; }
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multiclass { return MULTICLASS; }
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field { return FIELD; }
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let { return LET; }
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in { return IN; }
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@ -22,8 +22,19 @@ int yyerror(const char *ErrorMsg);
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int yylex();
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namespace llvm {
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struct MultiClass {
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Record Rec; // Placeholder for template args and Name.
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std::vector<Record*> DefPrototypes;
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MultiClass(const std::string &Name) : Rec(Name) {}
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};
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static std::map<std::string, MultiClass*> MultiClasses;
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extern int Filelineno;
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static MultiClass *CurMultiClass = 0; // Set while parsing a multiclass.
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static std::string *CurDefmPrefix = 0; // Set while parsing defm.
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static Record *CurRec = 0;
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static bool ParsingTemplateArgs = false;
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@ -45,8 +56,16 @@ static std::vector<std::vector<LetRecord> > LetStack;
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extern std::ostream &err();
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/// getActiveRec - If inside a def/class definition, return the def/class.
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/// Otherwise, if within a multidef, return it.
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static Record *getActiveRec() {
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return CurRec ? CurRec : &CurMultiClass->Rec;
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}
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static void addValue(const RecordVal &RV) {
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if (RecordVal *ERV = CurRec->getValue(RV.getName())) {
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Record *TheRec = getActiveRec();
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if (RecordVal *ERV = TheRec->getValue(RV.getName())) {
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// The value already exists in the class, treat this as a set...
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if (ERV->setValue(RV.getValue())) {
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err() << "New definition of '" << RV.getName() << "' of type '"
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@ -55,7 +74,7 @@ static void addValue(const RecordVal &RV) {
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exit(1);
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}
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} else {
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CurRec->addValue(RV);
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TheRec->addValue(RV);
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}
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}
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@ -148,33 +167,33 @@ static void addSubClass(Record *SC, const std::vector<Init*> &TemplateArgs) {
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if (TArgs.size() < TemplateArgs.size()) {
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err() << "ERROR: More template args specified than expected!\n";
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exit(1);
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} else { // This class expects template arguments...
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// Loop over all of the template arguments, setting them to the specified
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// value or leaving them as the default if necessary.
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for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
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if (i < TemplateArgs.size()) { // A value is specified for this temp-arg?
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// Set it now.
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setValue(TArgs[i], 0, TemplateArgs[i]);
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}
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// Loop over all of the template arguments, setting them to the specified
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// value or leaving them as the default if necessary.
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for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
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if (i < TemplateArgs.size()) { // A value is specified for this temp-arg?
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// Set it now.
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setValue(TArgs[i], 0, TemplateArgs[i]);
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// Resolve it next.
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CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
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// Now remove it.
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CurRec->removeValue(TArgs[i]);
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// Resolve it next.
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CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
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// Now remove it.
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CurRec->removeValue(TArgs[i]);
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} else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
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err() << "ERROR: Value not specified for template argument #"
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<< i << " (" << TArgs[i] << ") of subclass '" << SC->getName()
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<< "'!\n";
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exit(1);
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}
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} else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
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err() << "ERROR: Value not specified for template argument #"
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<< i << " (" << TArgs[i] << ") of subclass '" << SC->getName()
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<< "'!\n";
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exit(1);
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}
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}
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// Since everything went well, we can now set the "superclass" list for the
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// current record.
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const std::vector<Record*> &SCs = SC->getSuperClasses();
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const std::vector<Record*> &SCs = SC->getSuperClasses();
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for (unsigned i = 0, e = SCs.size(); i != e; ++i)
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addSuperClass(SCs[i]);
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addSuperClass(SC);
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@ -194,18 +213,20 @@ using namespace llvm;
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std::vector<llvm::Init*>* FieldList;
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std::vector<unsigned>* BitList;
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llvm::Record* Rec;
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std::vector<llvm::Record*>* RecList;
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SubClassRefTy* SubClassRef;
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std::vector<SubClassRefTy>* SubClassList;
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std::vector<std::pair<llvm::Init*, std::string> >* DagValueList;
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};
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%token INT BIT STRING BITS LIST CODE DAG CLASS DEF FIELD LET IN
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%token INT BIT STRING BITS LIST CODE DAG CLASS DEF MULTICLASS DEFM FIELD LET IN
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%token SHLTOK SRATOK SRLTOK STRCONCATTOK
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%token <IntVal> INTVAL
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%token <StrVal> ID VARNAME STRVAL CODEFRAGMENT
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%type <Ty> Type
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%type <Rec> ClassInst DefInst Object ObjectBody ClassID
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%type <Rec> ClassInst DefInst MultiClassDef ObjectBody ClassID
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%type <RecList> MultiClassBody
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%type <SubClassRef> SubClassRef
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%type <SubClassList> ClassList ClassListNE
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@ -221,7 +242,18 @@ using namespace llvm;
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%%
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ClassID : ID {
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$$ = Records.getClass(*$1);
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if (CurDefmPrefix) {
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// If CurDefmPrefix is set, we're parsing a defm, which means that this is
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// actually the name of a multiclass.
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MultiClass *MC = MultiClasses[*$1];
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if (MC == 0) {
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err() << "Couldn't find class '" << *$1 << "'!\n";
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exit(1);
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}
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$$ = &MC->Rec;
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} else {
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$$ = Records.getClass(*$1);
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}
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if ($$ == 0) {
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err() << "Couldn't find class '" << *$1 << "'!\n";
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exit(1);
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@ -260,6 +292,12 @@ IDValue : ID {
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const RecordVal *RV = CurRec->getValue(CurRec->getName()+":"+*$1);
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assert(RV && "Template arg doesn't exist??");
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$$ = new VarInit(CurRec->getName()+":"+*$1, RV->getType());
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} else if (CurMultiClass &&
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CurMultiClass->Rec.isTemplateArg(CurMultiClass->Rec.getName()+"::"+*$1)) {
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std::string Name = CurMultiClass->Rec.getName()+"::"+*$1;
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const RecordVal *RV = CurMultiClass->Rec.getValue(Name);
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assert(RV && "Template arg doesn't exist??");
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$$ = new VarInit(Name, RV->getType());
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} else if (Record *D = Records.getDef(*$1)) {
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$$ = new DefInit(D);
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} else {
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@ -467,8 +505,15 @@ ValueListNE : Value {
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Declaration : OptPrefix Type ID OptValue {
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std::string DecName = *$3;
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if (ParsingTemplateArgs)
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DecName = CurRec->getName() + ":" + DecName;
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if (ParsingTemplateArgs) {
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if (CurRec) {
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DecName = CurRec->getName() + ":" + DecName;
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} else {
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assert(CurMultiClass);
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}
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if (CurMultiClass)
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DecName = CurMultiClass->Rec.getName() + "::" + DecName;
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}
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addValue(RecordVal(DecName, $2, $1));
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setValue(DecName, 0, $4);
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@ -510,10 +555,10 @@ ClassList : /*empty */ {
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};
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DeclListNE : Declaration {
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CurRec->addTemplateArg(*$1);
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getActiveRec()->addTemplateArg(*$1);
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delete $1;
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} | DeclListNE ',' Declaration {
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CurRec->addTemplateArg(*$3);
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getActiveRec()->addTemplateArg(*$3);
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delete $3;
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};
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@ -551,12 +596,25 @@ DefName : ObjectName {
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CurRec = new Record(*$1);
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delete $1;
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// Ensure redefinition doesn't happen.
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if (Records.getDef(CurRec->getName())) {
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err() << "Def '" << CurRec->getName() << "' already defined!\n";
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exit(1);
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if (!CurMultiClass) {
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// Top-level def definition.
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// Ensure redefinition doesn't happen.
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if (Records.getDef(CurRec->getName())) {
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err() << "def '" << CurRec->getName() << "' already defined!\n";
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exit(1);
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}
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Records.addDef(CurRec);
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} else {
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// Otherwise, a def inside a multiclass, add it to the multiclass.
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for (unsigned i = 0, e = CurMultiClass->DefPrototypes.size(); i != e; ++i)
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if (CurMultiClass->DefPrototypes[i]->getName() == CurRec->getName()) {
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err() << "def '" << CurRec->getName()
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<< "' already defined in this multiclass!\n";
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exit(1);
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}
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CurMultiClass->DefPrototypes.push_back(CurRec);
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}
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Records.addDef(CurRec);
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};
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ObjectBody : ClassList {
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@ -594,8 +652,112 @@ DefInst : DEF DefName ObjectBody {
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$$ = $3;
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};
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// MultiClassDef - A def instance specified inside a multiclass.
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MultiClassDef : DefInst {
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$$ = $1;
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// Copy the template arguments for the multiclass into the def.
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const std::vector<std::string> &TArgs = CurMultiClass->Rec.getTemplateArgs();
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for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
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const RecordVal *RV = CurMultiClass->Rec.getValue(TArgs[i]);
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assert(RV && "Template arg doesn't exist?");
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$$->addValue(*RV);
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}
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};
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Object : ClassInst | DefInst;
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// MultiClassBody - Sequence of def's that are instantiated when a multiclass is
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// used.
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MultiClassBody : MultiClassDef {
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$$ = new std::vector<Record*>();
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$$->push_back($1);
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} | MultiClassBody MultiClassDef {
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$$->push_back($2);
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};
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MultiClassName : ID {
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MultiClass *&MCE = MultiClasses[*$1];
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if (MCE) {
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err() << "multiclass '" << *$1 << "' already defined!\n";
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exit(1);
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}
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MCE = CurMultiClass = new MultiClass(*$1);
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delete $1;
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};
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// MultiClass - Multiple definitions.
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MultiClassInst : MULTICLASS MultiClassName {
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ParsingTemplateArgs = true;
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} OptTemplateArgList {
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ParsingTemplateArgs = false;
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}'{' MultiClassBody '}' {
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CurMultiClass = 0;
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};
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// DefMInst - Instantiate a multiclass.
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DefMInst : DEFM ID { CurDefmPrefix = $2; } ':' SubClassRef ';' {
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// To instantiate a multiclass, we need to first get the multiclass, then
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// instantiate each def contained in the multiclass with the SubClassRef
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// template parameters.
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MultiClass *MC = MultiClasses[$5->first->getName()];
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assert(MC && "Didn't lookup multiclass correctly?");
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std::vector<Init*> &TemplateVals = *$5->second;
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delete $5;
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// Verify that the correct number of template arguments were specified.
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const std::vector<std::string> &TArgs = MC->Rec.getTemplateArgs();
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if (TArgs.size() < TemplateVals.size()) {
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err() << "ERROR: More template args specified than multiclass expects!\n";
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exit(1);
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}
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// Loop over all the def's in the multiclass, instantiating each one.
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for (unsigned i = 0, e = MC->DefPrototypes.size(); i != e; ++i) {
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Record *DefProto = MC->DefPrototypes[i];
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// Add the suffix to the defm name to get the new name.
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assert(CurRec == 0 && "A def is current?");
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CurRec = new Record(*$2 + DefProto->getName());
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addSubClass(DefProto, std::vector<Init*>());
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// Loop over all of the template arguments, setting them to the specified
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// value or leaving them as the default if necessary.
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for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
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if (i < TemplateVals.size()) { // A value is specified for this temp-arg?
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// Set it now.
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setValue(TArgs[i], 0, TemplateVals[i]);
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// Resolve it next.
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CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
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// Now remove it.
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CurRec->removeValue(TArgs[i]);
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} else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
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err() << "ERROR: Value not specified for template argument #"
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<< i << " (" << TArgs[i] << ") of multiclassclass '"
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<< MC->Rec.getName() << "'!\n";
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exit(1);
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}
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}
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// Ensure redefinition doesn't happen.
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if (Records.getDef(CurRec->getName())) {
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err() << "def '" << CurRec->getName() << "' already defined, "
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<< "instantiating defm '" << *$2 << "' with subdef '"
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<< DefProto->getName() << "'!\n";
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exit(1);
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}
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Records.addDef(CurRec);
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CurRec = 0;
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}
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delete &TemplateVals;
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delete $2;
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};
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Object : ClassInst {} | DefInst {};
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Object : MultiClassInst | DefMInst;
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LETItem : ID OptBitList '=' Value {
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LetStack.back().push_back(LetRecord(*$1, $2, $4));
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@ -617,7 +779,7 @@ Object : LETCommand '{' ObjectList '}' {
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ObjectList : Object {} | ObjectList Object {};
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File : ObjectList {};
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File : ObjectList;
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%%
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